/* VORLUX Academy — APP SYSTEM W0 (2026-10-27, spec app-system-spec.md §§C–D.6).
   App shell & entry layer: splash, banner slot, desktop rail, phone bottom
   nav, paid-lesson lock, start screen. Loaded AFTER site.css on every page
   except the frozen bab-almanya prototype. Vanilla CSS, no libraries.
   Icons: stroke SVG only (Directive 001). Green stays the correct-answer
   colour — never used here. */

/* ---------- Banner slot (above the header; renders only with a real notice) ---------- */
.vx-banner{position:relative;z-index:65;display:flex;align-items:center;justify-content:center;gap:.7rem;
  padding:.5rem 3rem .5rem 1rem;background:linear-gradient(92deg,#0c1a36,#14264c 55%,#1b2f5e);
  color:#eaf3ff;font-size:.92rem;text-align:center}
.vx-banner a{color:#8fd8ff;font-weight:700;text-decoration:underline;text-underline-offset:3px}
.vx-banner .vx-banner-x{position:absolute;right:.6rem;top:50%;transform:translateY(-50%);
  width:34px;height:34px;display:grid;place-items:center;border:0;border-radius:10px;
  background:rgba(255,255,255,.08);color:#eaf3ff;cursor:pointer}
.vx-banner .vx-banner-x:hover{background:rgba(255,255,255,.16)}

/* ---------- Desktop rail (the ribbon, vertical; app pages, account mode) ---------- */
.vx-rail{display:none}
@media (min-width:1024px){
  .vx-rail{position:fixed;left:0;top:0;bottom:0;width:236px;z-index:60;display:flex;flex-direction:column;
    gap:1rem;padding:1.1rem .9rem;background:var(--panel);border-right:1px solid var(--line);
    box-shadow:8px 0 24px -18px rgba(20,38,76,.25)}
  body.vx-railed{padding-left:236px}
}
.vx-rail .vx-rail-brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink)}
.vx-rail .vx-rail-brand img{width:38px;height:38px}
.vx-rail .vx-rail-brand b{font-size:1.05rem;letter-spacing:.04em}
.vx-rail .vx-rail-brand small{display:block;color:var(--mut);font-weight:600;font-size:.72rem;letter-spacing:.02em}
.vx-rail-status{background:var(--panel2);border:1px solid var(--line);border-radius:14px;padding:.7rem .8rem}
.vx-rail-status span{display:block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mut)}
.vx-rail-status b{color:var(--ink);font-size:1rem}
.vx-rail nav{display:flex;flex-direction:column;gap:.3rem}
.vx-rail nav a{display:flex;align-items:center;gap:.65rem;padding:.62rem .7rem;border-radius:12px;
  color:var(--body);text-decoration:none;font-weight:600}
.vx-rail nav a svg{flex:0 0 auto}
.vx-rail nav a:hover{background:var(--panel2);color:var(--ink)}
.vx-rail nav a.on{background:var(--btn-grad);color:#fff;box-shadow:var(--btn-sh)}
.vx-rail-plan{margin-top:auto;border:1px solid var(--line);border-radius:14px;padding:.75rem .8rem;background:var(--panel2)}
.vx-rail-plan span{display:block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mut)}
.vx-rail-plan b{color:var(--ink)}
.vx-rail-plan a{display:inline-block;margin-top:.45rem;font-weight:700;color:var(--brand-d);text-decoration:none}
[data-theme="dark"] .vx-rail-plan a{color:#8fd8ff}
.vx-rail-plan a:hover{text-decoration:underline;text-underline-offset:3px}

/* ---------- Phone bottom nav (the ribbon at the bottom; < 1024px) ---------- */
.vx-tabbar{display:none}
@media (max-width:1023.98px){
  .vx-tabbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;
    background:var(--header-bg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
  body.vx-tabbed{padding-bottom:calc(72px + env(safe-area-inset-bottom))}
  .vx-tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
    min-height:56px;padding:.4rem 0 .3rem;color:var(--mut);text-decoration:none;font-size:.72rem;font-weight:700}
  .vx-tabbar a svg{display:block}
  .vx-tabbar a.on{color:var(--brand-d)}
  [data-theme="dark"] .vx-tabbar a.on{color:#57b8ff}
  .vx-tabbar a.on .vx-tab-dot{width:18px;height:3px;border-radius:99px;background:var(--grad)}
  .vx-tab-dot{width:18px;height:3px;border-radius:99px;background:transparent}
}

/* ---------- Splash (entry surfaces only; frequency-ruled in app.js) ---------- */
.vx-splash{position:fixed;inset:0;z-index:200;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:1rem;padding:2rem;text-align:center;color:#fff;cursor:pointer;
  background:linear-gradient(160deg,#0c1a36 0%,#14264c 55%,#1d3163 100%);overflow:hidden;
  transition:opacity .45s ease}
.vx-splash::before{content:"";position:absolute;inset:-20%;
  background:radial-gradient(42% 38% at 22% 18%,rgba(46,155,255,.35),transparent 70%),
             radial-gradient(38% 34% at 82% 76%,rgba(124,92,255,.32),transparent 70%),
             radial-gradient(30% 26% at 74% 16%,rgba(56,225,255,.22),transparent 70%)}
.vx-splash.out{opacity:0;pointer-events:none}
.vx-splash .vx-splash-logo{position:relative;width:min(168px,44vw);height:auto;border-radius:28px;
  box-shadow:0 30px 60px -20px rgba(0,0,0,.55);animation:vxSplashIn .8s cubic-bezier(.2,.8,.25,1) both}
.vx-splash .vx-splash-name{position:relative;font-size:clamp(1.9rem,7vw,2.7rem);font-weight:800;letter-spacing:.14em;
  animation:vxSplashIn .8s .12s cubic-bezier(.2,.8,.25,1) both}
.vx-splash .vx-splash-tag{position:relative;color:#c9dcff;font-size:clamp(1rem,3.6vw,1.15rem);
  animation:vxSplashIn .8s .24s cubic-bezier(.2,.8,.25,1) both}
.vx-splash .vx-splash-skip{position:relative;margin-top:1.2rem;color:#8fb6e8;font-size:.85rem;font-weight:600;
  animation:vxSplashIn .8s .4s cubic-bezier(.2,.8,.25,1) both}
.vx-splash .vx-splash-sweep{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.vx-splash .vx-splash-sweep::after{content:"";position:absolute;top:-30%;bottom:-30%;width:34%;left:-45%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.14),transparent);
  animation:vxSweep 1.6s .3s ease-in-out both}
@keyframes vxSplashIn{from{opacity:0;transform:translateY(14px) scale(.96)}to{opacity:1;transform:none}}
@keyframes vxSweep{to{left:115%}}
@media (prefers-reduced-motion: reduce){
  .vx-splash .vx-splash-logo,.vx-splash .vx-splash-name,.vx-splash .vx-splash-tag,.vx-splash .vx-splash-skip{animation:none}
  .vx-splash .vx-splash-sweep::after{animation:none;display:none}
  .vx-splash{transition:none}
}

/* ---------- Start screen (start.html) ---------- */
.vx-start{max-width:760px;margin:0 auto}
.vx-start-head{text-align:center;margin-bottom:1.6rem}
.vx-start-head img{width:84px;height:84px;border-radius:20px;box-shadow:var(--shadow)}
.vx-start-head h1{margin:.7rem 0 .3rem}
.vx-paths{display:grid;gap:1rem}
@media (min-width:720px){.vx-paths{grid-template-columns:1fr 1fr 1fr}}
.vx-path{display:flex;flex-direction:column;gap:.55rem;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:1.15rem;text-decoration:none;color:var(--body)}
.vx-path svg{color:var(--brand-d)}
[data-theme="dark"] .vx-path svg{color:#57b8ff}
.vx-path b{color:var(--ink);font-size:1.06rem}
.vx-path p{margin:0;font-size:.93rem}
.vx-path .btn{margin-top:auto;text-align:center}
.vx-gate-note{border:1px solid var(--warn);background:var(--warn-pale);color:var(--ink);
  border-radius:14px;padding:.8rem 1rem;margin-bottom:1.1rem;font-weight:600}
[data-theme="dark"] .vx-gate-note{background:rgba(255,200,0,.12)}

/* ---------- Paid-lesson lock (W0: honest UX hint, spec §D.2) ---------- */
.vx-lock{position:fixed;inset:0;z-index:150;display:flex;align-items:center;justify-content:center;padding:1.2rem;
  background:rgba(8,17,38,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.vx-lock-card{background:var(--panel);color:var(--body);border:1px solid var(--line);border-radius:20px;
  box-shadow:var(--shadow-lg);max-width:520px;width:100%;padding:1.6rem;text-align:center}
.vx-lock-card svg{color:var(--brand-d)}
[data-theme="dark"] .vx-lock-card svg{color:#57b8ff}
.vx-lock-card h2{color:var(--ink);margin:.6rem 0 .4rem;font-size:1.35rem}
.vx-lock-card p{margin:.3rem 0}
.vx-lock-card .actions{display:flex;gap:.6rem;justify-content:center;flex-wrap:wrap;margin-top:1.1rem}
body.vx-locked main{pointer-events:none}